Grinding and polishing wheel.



P. J. TONE.

GRINDING AND POLISHING WHEEL.

'APPLIOATION FILED NOV. 11, 1905.

' 986,246 Patented Mar. 7, 1911.

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wnuzssss H l5 1 mvsmon UNITED STATES P rENT OFFICE.

FRANK J'. TONE, OF NIAGARA FALLS, NEW YORK, ASSIGNOR TO THE CARBORUNDUM COMPANY, OF NIAGARA FALLS, NEW YORK, A CORPORATION OF PENNSYLVANIA.

GRINDING AND POLISHING WHEEL.

Specification of Letters Patent.

Patented Mar. 7, 1911.

Application filed November 11, 1905. Serial No. 286,797.

T 0 all whom it may concern:

' Be it known that I, FRANK J. Town, of Niagara Falls, Niagara county, New York, have invented a new and useful Improve ment in Grinding and Polishing Wheels, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side or end view of a wheel embodying the invention; Fig. 2 is a similar view of a portion of a wheel, illustrating a modified form; and Fig. 3 is a perspective view of the abrasive strip or band of Fig. 2.

My invention relates to grinding and polishing wheels of the class in which an abrasive strip or band is mounted on the periphery of the wheel, and more particularly refers to the means whereby such strip is secured to the wheel. In the operation of grinding and polishing wheels of this class, there is a. tendency for the abrasive strip to creep or stretch in a direction of rotation, owing to the pressure of the work against the strip.

h [y invention is designed to provide simple means whereby the strips may be quickly and efliciently applied to and removed from the wheel and which is so arranged that all stretch or slack of the strip or band is auto matically taken up.

My invention consists in providing the wheel with fixed clamping means for receiving and retaining one end of the strip and independent tension means arranged to receive and clamp the other end of the strip in the novel manner hereinafter described.

In the drawings, the numeral 2 designates the rim of the wheel and 3 an abrasive strip or band secured thereto. To receive the end portions of the strip, the rim and web portion of the wheel are slotted as shown at 4:. One end of the strip 3 which I hereinafter designate as the leading end, is passed through this slot and back over its in ardly beveled edge where it is held, in the form shown in Fig. 1 between clamping jaws G and 7, the jaw 7 being preferably formed integrally with the wheel, while the jaws G consist of a pivoted lever which is held in clamping position by means of a screw 8 seated therein and having a. bearing against the inner surface of the rim of the wheel. The other end of the strip, which I hereinafter designate as the following end is also carried through the slot at over the opposite edge thereofand is fastened between the clamping jaws 9 of a block 10 having a stem portion 1]. which is arranged to slide freely through guides 12 on the web of the wheel unoer the action of a tension spring 13. This spring is coiled around the stem 11 with a hearing at one end against one of the guides 12 and at the other end against a pin or other bearing 13 on said stem whereby said block is caused to exert a constant pull upon the following end of the strip. The edge of the slot over which the following end is passed, is beveled, and the tension device just described is arranged in such position that the direction of its pull shall be as nearly possible tangential to the periphery of the wheel at the point of the slot. This gives the device a maximum effective pull and reduces the friction of the strip at the edge of the slot. One of the clamping jaws 9 is shown as formed integral with the block 10, while the other is movable and is actuated by a screw lt.

In the arrangement shown in Fig. 2 I dispense with the clamping jaws, by providing the ends of the strip 2 with binding clips or reinforcements 15 as shown in Fig. 3, one of which clips is seated in a slot 16 extending through the wheel in a direction parallel to its axis, and the other of which is seated in a similar slot 1'? in the sliding tension block 10.

It will be readily seen that the constant pull exerted upon the following end of the strip by the tension device will at all times keep the strip free from stretch or slack, while at the same time, the arrangement is such as to permit the strip to be quickly fastened and released when applying it to or removing it from the periphery of the wheel.

I have shown the invention as applied to a grinding wheel having a relatively narrow periphery. The invention is equally applicable to wide wheels and cylinders, in which case one of the tension devices arranged as described may be used at each end, or a single device may be used at the central portion of the cylinder.

It will be obvious that the particular means for attaching the leading end of the strip to the wheel, and also the particular means for attaching the following end of the strip to the tension block may be of carried by the Wheel and having an openend seat in Which the other relnforclng strip is seated, said seat having a slot at one side for the strip to pass through,substantially as described.

In testimony whereof, I have hereunto set my hand.

FRANK J. TONE.

Htnesses ARTHUR Birr'rs, FRED I. PIERCE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

